Malicious PDF — malware analysis report

Static analysis result for SHA-256 0262eeef16ab5f84…

MALICIOUS

PDF

79.8 KB Created: 2021-03-09 01:35:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d76c53003dfe9f8b0101b0d2b04d57a7 SHA-1: d28b82ae00eeb777552dc44c2c55329861ebe232 SHA-256: 0262eeef16ab5f84c878b27552718f2f0c00b8c7e10f8006db26edf3448c2710
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as https://midufefew.ru/award?keyword=angulos+y+rectas+1o+eso+pdf, are likely used to redirect users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/award?keyword=angulos+y+rectas+1o+eso+pdf PDF link annotation
    • https://dejalujufoleto.weebly.com/uploads/1/3/1/3/131378776/2163873.pdfIn PDF document text
    • https://dopapebo.weebly.com/uploads/1/3/4/8/134870178/letalakajebat.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/do_you_lose_more_weight_strength_training.pdfIn PDF document text
    • http://politach.com/nfl_network_channel_comcastdlsus.pdfIn PDF document text
    • http://nosinoski.shop/what_a_bagel_bagel_calorieslh339.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/cuisinart_pro_classic_7_cup_food_processor.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/mole_concept_questions_with_solutions.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/xezila.pdfIn PDF document text
    • https://fosovumukudire.weebly.com/uploads/1/3/4/2/134235423/8593727.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/15821288289.pdfIn PDF document text
    • http://hightrade.club/heart_of_algebra_practice_problemsv4jyz.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/3977290.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/garmin_nuvi_2639lmt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63249a05-39cf-4cb4-b72e-3e484e0a84d8/wizardry_6_maps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c006ceef-a7cc-400e-b7c1-574f29ac4968/pejibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5e94552-38d1-4a54-8a05-986acbf05e1b/officejet_pro_8600_not_printing_wirelessly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848aad42-4b51-48c4-97d2-56daa2e92489/hoover_elite_rewind_vacuum_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c3c3de-668b-4ea9-bf4e-0bf9935a9ab5/62553514488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be5249c-f840-4566-9ae4-01c57aa2a104/99406366142.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/human_resource_mgt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb63bfcb-622b-49d2-950f-4586d8a03e63/kidofafel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cbb0d81-f10f-4ba1-b881-07a9a1820717/the_secret_history_audiobook_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 5464 bytes
SHA-256: 5de35e41274d4c65d3a73bad3da6ff53ccdd1dad756ef64b3d7644e28901dd8b
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 1932 bytes
SHA-256: 79146b382a30d57b86cd31aee382fdde8e94a7721889692ffed962feefcb06eb
font_02_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 13376 bytes
SHA-256: e3cdb41f113a79477ad17846d8605bdd0cacffa3d4ce7a5a2a6a4644a03d5ab6